Abstract
Recent topics relating to the magneto-optics of diluted magnetic semiconductors (DMS) are described. After explaining how the hybridization of d-electron states of transition metal ions with the sp-band electron (sp-d exchange interaction) causes the Zeeman splittings and magneto-optic effects, we will describe the magneto-optic studies of magnetic ordering in Cdl-x Mn x Te (0 ≤ x ≤1) and CdTe/Cd1-x Mn x Te quantum wells. Then the electronic structures of new DMS, i.e. Cr–and Ni–based II-VI DMS and III-V DMS Ga1 -x Mn x As, are discussed. Finally we describe the applications of DMS for the magneto-optic waveguide in integrated optics and the control of Mn2+ moment by photo-injected carriers.
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